How to Fix ‘listen EADDRINUSE Address Already in Use 9000 Windows 10’ Error in NodeJS

The error message “listen EADDRINUSE Address Already” usually means that the port that your application is trying to use is already in use by another process or application. To fix this error, you can try the following steps:

1. Find the process that is using the port:On Unix-based systems, you can use the command lsof -i :<port> to find the process that is using the port. For example, if your application is trying to use port 3000, you can use the command lsof -i :3000.On Windows, you can use the command netstat -ano | findstr :<port> to find the process that is using the port. For example, if your application is trying to use port 3000, you can use the command netstat -ano | findstr :3000.
2. Kill the process:Once you have identified the process that is using the port, you can kill it using the appropriate command. On Unix-based systems, you can use the kill command followed by the process ID. On Windows, you can use the taskkill command followed by the process ID.For example, on Unix-based systems, you can use the command kill <process-id> to kill the process. On Windows, you can use the command taskkill /PID <process-id> /F to force kill the process.
3. Restart your application:After killing the process that was using the port, you should be able to restart your application without encountering the “EADDRINUSE” error.
4. Change the port your application is listening on:If you cannot kill the process using the port, you can change the port that your application is listening on. To do this, you can modify the configuration or code of your application to listen on a different port. For example, if your application was listening on port 3000, you can change it to listen on port 4000 instead.